Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Debug\FatalErrorHandler;
Chris@0: 
Chris@17: use Symfony\Component\Debug\Exception\FatalErrorException;
Chris@0: use Symfony\Component\Debug\Exception\UndefinedFunctionException;
Chris@0: 
Chris@0: /**
Chris@0:  * ErrorHandler for undefined functions.
Chris@0:  *
Chris@0:  * @author Fabien Potencier <fabien@symfony.com>
Chris@0:  */
Chris@0: class UndefinedFunctionFatalErrorHandler implements FatalErrorHandlerInterface
Chris@0: {
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function handleError(array $error, FatalErrorException $exception)
Chris@0:     {
Chris@17:         $messageLen = \strlen($error['message']);
Chris@0:         $notFoundSuffix = '()';
Chris@17:         $notFoundSuffixLen = \strlen($notFoundSuffix);
Chris@0:         if ($notFoundSuffixLen > $messageLen) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         if (0 !== substr_compare($error['message'], $notFoundSuffix, -$notFoundSuffixLen)) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         $prefix = 'Call to undefined function ';
Chris@17:         $prefixLen = \strlen($prefix);
Chris@0:         if (0 !== strpos($error['message'], $prefix)) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         $fullyQualifiedFunctionName = substr($error['message'], $prefixLen, -$notFoundSuffixLen);
Chris@0:         if (false !== $namespaceSeparatorIndex = strrpos($fullyQualifiedFunctionName, '\\')) {
Chris@0:             $functionName = substr($fullyQualifiedFunctionName, $namespaceSeparatorIndex + 1);
Chris@0:             $namespacePrefix = substr($fullyQualifiedFunctionName, 0, $namespaceSeparatorIndex);
Chris@0:             $message = sprintf('Attempted to call function "%s" from namespace "%s".', $functionName, $namespacePrefix);
Chris@0:         } else {
Chris@0:             $functionName = $fullyQualifiedFunctionName;
Chris@0:             $message = sprintf('Attempted to call function "%s" from the global namespace.', $functionName);
Chris@0:         }
Chris@0: 
Chris@17:         $candidates = [];
Chris@0:         foreach (get_defined_functions() as $type => $definedFunctionNames) {
Chris@0:             foreach ($definedFunctionNames as $definedFunctionName) {
Chris@0:                 if (false !== $namespaceSeparatorIndex = strrpos($definedFunctionName, '\\')) {
Chris@0:                     $definedFunctionNameBasename = substr($definedFunctionName, $namespaceSeparatorIndex + 1);
Chris@0:                 } else {
Chris@0:                     $definedFunctionNameBasename = $definedFunctionName;
Chris@0:                 }
Chris@0: 
Chris@0:                 if ($definedFunctionNameBasename === $functionName) {
Chris@0:                     $candidates[] = '\\'.$definedFunctionName;
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         if ($candidates) {
Chris@0:             sort($candidates);
Chris@0:             $last = array_pop($candidates).'"?';
Chris@0:             if ($candidates) {
Chris@0:                 $candidates = 'e.g. "'.implode('", "', $candidates).'" or "'.$last;
Chris@0:             } else {
Chris@0:                 $candidates = '"'.$last;
Chris@0:             }
Chris@0:             $message .= "\nDid you mean to call ".$candidates;
Chris@0:         }
Chris@0: 
Chris@0:         return new UndefinedFunctionException($message, $exception);
Chris@0:     }
Chris@0: }